<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <title>HTML的文档结构</title>  <!-- 标题 -->
    <link rel="stylesheet" type="text/css" href="">  <!-- 外联式css -->
    <script type="text/javascript"></script> <!-- js脚本 -->
    <style type="text/css"></style>  <!-- css内联式 -->
</head>
<body>
    
</body>
</html>